KR970057719A

KR970057719A - Image size converting device in video encoding device

Info

Publication number: KR970057719A
Application number: KR1019950069147A
Authority: KR
Inventors: 이상일
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-30
Filing date: 1995-12-30
Publication date: 1997-07-31

Abstract

본 발명의 동영상 부호화장치에 있어서 영상의 크기 변환장치에 관한 것으로서, 현재 입력되는 영상의 사이즈와 변환시키고자 하는 영상의 사이즈의 비에 따른 샘플링클럭을 발생시키는 샘플링클럭 발생기(27), 현재 입력되는 영상신호를 샘플링클럭에 의해 디지탈신호로 변환한는 제1아날로그/디지탈 변환기(21),수평사이즈가 변환된 영상데이타를 8비트씩 비트별로 저장하는 제1버퍼(22),제1버퍼에서 출력되는 영상데이타에 대하여 비트역별로 아날로그신호로 변환하는 디지탈/아날로그 변환기(23),디지탈/아날로그 변환기의 출력신호를 샘플링클럭에 의해 업 또는 다운 샘플링하는 업/다운 샘플링기(24),업/다운 샘플링기의 출력신호를 다시 비트열별로 디지탈신호로 변환하는 제2아날로그/디지탈 변환기(25),제2아날로그/디지탈 변환기의 출력신호를 저장한 후, 8비트씩 출력시키는 제2버퍼(26)로 구성된다. 따라서 변환하고자 하는 영상의 크기가 다양한 경우에도 원하는 영상의 사이즈에 대한 샘플링클럭을 발생시켜 임의의 수평 사이즈 및 수직 사이즈로 변환시킬 수 있을 뿐 아니라 변환된 사이즈의 영상의 화질을 개선시킬 수 있다.The video encoding apparatus of the present invention relates to an image size converting apparatus, comprising: a sampling clock generator 27 for generating a sampling clock according to a ratio of a size of a video currently input to a size of a video to be converted; A first analog / digital converter 21 converting a video signal into a digital signal by a sampling clock 21, a first buffer 22 for storing the image data whose horizontal size is converted into bits by bit, and output from the first buffer. Digital / analog converter 23 for converting image data into analog signals for each bit region, up / down sampler 24 for up or down sampling the output signal of digital / analog converter by sampling clock, and up / down sampling The output signal of the second analog / digital converter 25 and the second analog / digital converter which convert the output signal of the controller After one, it consists of a second buffer 26 for outputting 8 bits. Therefore, even when the size of the image to be converted is varied, a sampling clock for the desired size of the image can be generated and converted into an arbitrary horizontal size and vertical size, and the image quality of the converted size can be improved.

Description

Image size converting device in video encoding device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 영상의 크기 변환장치를 나타낸 블럭도,1 is a block diagram showing an apparatus for converting a size of a conventional image;

제2도는 본 발명에 의한 영상의 크기 변환장치를 나타낸 블럭도,2 is a block diagram showing an apparatus for converting an image size according to the present invention;

Claims

Sampling clock generator 27 for generating a sampling clock according to the ratio of the size of the current image to the size of the image to be converted; Digital signal by the sampling clock output from the sampling clock generator to the current input signal A first analog-to-digital converter 21 for converting the data into the first one; A first buffer 22 for storing image data having a horizontal size converted by the first analog / digital converter for each bit by bit; a digital signal for converting the image data output from the first buffer into analog signals for each bit string; An up / down sampler 24 for up or down sampling the output signal of the digital / analog converter by a sampling clock output from a long-term sampling clock generator; an output signal of the up / down sampler A second analog / digital converter 25 for converting the signal into a digital signal for each bit string again; and a second buffer 26 for storing the output signal of the second analog / digital converter and outputting each of the eight bits. An apparatus for converting a size of an image in a video encoding apparatus, characterized in that.

The apparatus of claim 1, wherein the capacity of the first buffer corresponds to image data of one frame.

※ Note: The disclosure is based on the initial application.